Replacement pack cylindrical hub structures

ABSTRACT

An axial hub structure for an abrasive work finishing wheel has a pair of parallel, axially spaced and coaxial end plates in the form of annular discs surrounding and appropriately connected directly to an axial driver, said plates extending radially normal to the axis of the wheel and serving to axially confine therebetween a circumferential series of packs of flexible abrasive sheets. Each of the packs is pivoted on one of a circumferentially spaced series of pins extending between the end plates and parallel to their axis. One of said plates is a removable one held in predetermined axial spacing from the other plate either by a sleeve-like hub part permanently connected unitarily to said other plate, by a separate sleeve extending between the plates, or by the pack pivoting pins themselves; and such sleeve or pin parts axially abut the removable end plate. On certain of the illustrated embodiments the non-removed end plate has through holes to receive prongs of a special knock-out tool, thus to facilitate displacement of the removable plate from the pin pivot and spacer means for access to the finishing packs in replacing any of the latter. In an alternate version the removable end plate is releasably held in place by a collar removably applied to the wheel&#39;&#39;s driver shaft.

elanger Nov. 20, W73

[54] REPLACEMENT PAQK CYLHNIDQAL HUB STRUCTURES [75] inventor: James A. Belanger, Livonia, Mich.

[73] Assignee: Belanger, llnc., Northville, Mich.

[22] Filed: June 23, 1971 21 Appl. No.: 156,008

[52] US. Cl. 51/337 [51] Int. Cl 32 th 9/02 [58] Field at Search ..5l/334-337 [56] References (iited UNITED STATES PATENTS 1,897,971 2/1933 Johnston 51/337 2,522,920 9/1950 Baltes 51/335 2,769,285 11/1956 Hendrickson 51/337 2,447,748 8/1948 Graham 51/337 2,174,385 9/1939 Holmes 51/33'7 2,533,619 12/1950 Pokras 51/335 Primary Examiner-Othell M. Simpson Attorney-L. Gaylord l-lulbert et al.

[57] ABSTRACT An axialhub structure for an abrasive work finishing wheel has a pair of parallel, axially spaced and coaxial end plates in the form of annular discs surrounding and appropriately connected directly to an axial driver, said plates extending radially normal to the axis of the wheel and serving to axially confine therebetween a circumferential series of packs of flexible abrasive sheets. Each of the packs is pivoted on one of a circumferentially spaced series of pins extending between the end plates and parallel to their axis. One of said plates is a removable one held in predetermined axial spacing from the other plate either by a sleevelike hub part permanently connected unitarily to said other plate, by a separate sleeve extending between the plates, or by the pack pivoting pins themselves; and such sleeve or pin parts axially abut the removable end plate. On certain of the illustrated embodiments the non-removed end plate has through holes to receive prongs of a special knock-out tool, thus to facilitate displacement of the removable plate from the pin pivot and spacer means for access to the finishing packs in replacing any of the latter. in an alternate version the removable end plate is releasably held in place by a collar removably applied to the wheels driver shaft.

4 Claims, 9 Drawing l igurw PAIENIEnunvzoma 3772.333

SHEET lEF 2 v 1 g wmromns REPLACEMENT PACK CYLINDRICAL ll-I UB STRUCTURES CROSS-REFERENCE TO RELATED APPLICATIONS The disclosure of my co-pending application, Ser. No. 885,734, filed Dec. 17, 1969, now U.S. Pat. No. 3,685,217 of Aug. 22, 1972, relates to a rotary finishing tool in which a hub structure includes abrasive flappivoting pins, flap-confining plates and plate spacing means generally similar to components mentioned in the Abstract of the present disclosure.

Another co-pending application, Ser. No. 155,733, filed June 23, I971, relates to another type of axially separable pack confining plate or flanged hub structure generally similar to what is herein disclosed, as well as to several versions of flap-like abrasive pack unit well suited for use in the present improvement.

BACKGROUND OF THE INVENTION 1. Field of the Invention The cylindrical hub structure herein disclosed has application in various types of buffing wheels, polishing wheels, and the like, for the abrasive working, brushing, burnishing or polishing of many types of work parts.

2. Description of the Prior Art A typical hub structure of the general nature of the improvement, i.e., in regard to pack pivoting pins and a hub and end plate unit, is shown in a prior U.S. Fat. to i-Iillix, No. 2,015,646 of Sept. 24, 1935, but I am unaware of any prior art disclosure of structural features and relationships as referred to in the above Abstract and later described in detail.

SUMMARY OF THE INVENTION The improved wheel hub structure is inexpensively mass-produced and assembled, being comprised of a very few types of simple parts. It permits a fast and easy dismantling for removal and replacement of any one or all of a circumferential array of like abrasive packs confined between its axial end plates or flanges, which packs are pivotally mounted on individual transverse pins spanning the axial space between said plates; and the pivot pins also serve in part as plate-abutting spacers to locate the plates in a proper axial spacing. This function may also be served by a cylindrical hub sleeve part between the plates.

A unique feature is that one of the plates carries a plurality of knock-out holes to receive a special tool for a fast and easy removal of the other plate from the assembly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a fragmentary axial end view of a typical abrasive finishing wheel having one embodiment of hub structure pursuant to the invention, utilizing a tubular hub sleeve on an end plate and the pivot pins as end plate spacers;

FIG. 2 is a fragmentary view in cross section on broken line 2-2 of FIG. 1;

FIG. 3 is a fragmentary view in section similar to FIG. 2 of an alternative hub pivot pin and end plate form or embodiment;

FIG. 4 is a view in transverse section at 90 to the hub axis; as on line 4-4 of FIG. 3;

FIG. 5 is a sectional view, in a plane including the hub axis, of another embodiment in which a separate cylindrical hub sleeve serves as a plate spacer, the plates being locked up in assembly by shaft shoulder and collar means;

FIG. 6 is a view in end section on line 6-6 of FIG.

FIGS. 7 and 8 are views, sectioned on a plane including the hub axis, or a structure according to the embodiment of FIG. 1, also showing a special end plate knock-out tool and the manner of its use; and

FIG. 9 is a perspective view of the tool.

DESCRIPTION OF PREFERRED EMBODIMENTS FIGS. 1 and 2 show one embodiment of finishing wheel hub structure pursuant to the invention, as generally designated by the reference numeral 10. It comprises an axially central and radially flanged tubular driving hub sub-assembly 11, about which a multiplicity of identical abrasive pack units 12 are pivotally mounted in an equal circumferential spacing. Each such pack may comprise a stack of superposed abrasive sheets 13 clamped together-adjacent a radially inner end thereof by means of a sheet mounting and pack pivoting member 14, as at an inner bight portion of the member, which may be of the type shown and described in either of my co-pending applications identified above. However, other types of pivotal mount adapted for association with a transverse pivot pin of the hub structure are, of course, contemplated.

As shown in FIGS. 1 and 2, that version of the cylindrical hub structure 11 comprises an axially inner hub component 15 made up of an inner cylindrical sleeve member 16 and a radially outwardly extending plate or flange member 17 mounted unitarily and concentrically on one axial end of said sleeve part 15. The latter may be in the form of a one-piece stamping of a suitably thick guage sheet metal having an integral disclike plate portion 17; or in the alternative the sleeve unit may comprise a plain inner cylindrical sleeve 16 to an end of which a disc or plate component 17 is welded or otherwise rigidly secured.

The fixed, non-removable plate or flange component 17 of hub structure 11 is provided with an annular array of cylindrical holes 19 adjacent its outer periphery, which holes are sized in diameter for a force-fitted reception of a pack pivot pin 20 in each thereof; and

the bights or loops of the mounting elements 14 of the abrasive packs 12 telescope axially on the pins, with a reasonable clearance for a free hinging of the pack in operation, as well as a ready axial end removal and replacement of the packs when worn.

The hub structure 1 1 of the wheel 10 is completed by a disc-like removable annular and radially extending plate or flange 22 at the end of sleeve part 15 opposite the latters plate 17. The sleeve hub element 16 and the plate 22 have circular center bores of equal diameter adapted to telescope a wheel driving shaft 23, to which they are drivingly connected by appropriate means (not shown). At a short radial distance outwardly of its bore, the removable plate 22 is provided with a pair of small diameter through-holes 24, diametrically spaced from one another, which receive locking pin or tenon I elements 25 fixed diametrically opposite one another on the adjacent end of the sleeve component 16. Said adjacent end fits into a counter-bore 26 of the removable plate 22, as fixed to shaft 23 for drive by the latter;

and the two pins 25 have a reasonably loose fit in the plate holes 24, thus serving to further couple plate 22 to sleeve hub part for rotation together. As axially abutted by sleeve component 16 in its counterbore 26, the removable end plate 22 is held releasably in proper axial spacing from the permanent end plate element 17.

Plate 22 is also provided on its inner axial surface with an annular series of partial depth recesses 28 corresponding in number and circumferential spacing with pivot pins 20; and each of these recesses 28 receives with a slip-fit the end of a pivot pin 20 opposite its end force-fitted to the plate element 17. The slip fit end of said pin has direct and flush axial abutment with the base of the recess 28 in a plane paralleling the radially extending plate 22. Accordingly, both the pivot pins 20 and the central hub sleeve 15, in axial end abutment with removable plate 22, serve to hold the end plates in proper axial spacing. Yet plate 22 is readily removed from and replaced on the pins and sleeve received in the holes 24 and counterbore 26 of plate 22 to hold the hub assembly 11 together in use.

Further in accordance with the invention, the flange plate 17 is provided, just radially outwardly of its associated hub element 16, with axially directed throughbores 30, shown in FIG. 1 as three in number, which holes have an equal circumferential distrubution and are adapted to receive an equal number of similarly spaced, elongated and round-ended prong or tine elements 31 (FIGS. 7-9) ofa special plate knock-out tool, generally designated by the reference numeral 32. These prongs are fixedly connected in any suitable fashion, for example, by force fits of the prongs at reduced diameter ends 33 thereof, in openings of an enlarged flange 34 of the tool 32. The latter has an integral elongated center strike shank 35 adapted to be end-impacted by a hammer or other appropriate tool.

With the hub assembly 11 completed by application of its removable end plate 22 in the manner described above, and of course, with the abrasive packs 12 in place, if it is desired to dismantle the hub structure for removal and replacement of any or all of such packs, the prongs 31 of tool 32 are inserted in the knock-out openings 30 of plate element 17 and, as shown in FIG. 8; a blow on the striker shank 35 of the tool causes the prongs to forceably displace plate 22 from hub part 16 and pivot pins 20 for the desired removal and replacement of abrasive packs.

In the embodiment of FIGS. 3 and 4, which also contemplates a resort to the same or a similar tool 32, the fixed pack confining plate, here designated 36, is in the form of a plain disc-like annulus fixedly applied suitably in driven relation to the operating shaft 23 without the intervening agency of a spacer sleeve portion characteristic of the form of FIGS. 1 and 2. In this instance, the pack pivoting pins alone, as specially designated 37, perform the plate spacing function. They are provided, as viewed in FIG. 3, with reduced diameter left-hand ends 38 which have a force fit in through-holes of plate 36 adjacent the outer periphery of the latter. The larger diameter body portion of each pin 37 axially abuts the inner surface of end plate 36, and is thus in effect a unitary pack pivoting component of the latter.

The opposite end plate 39 of the hub structure of FIGS. 3 and 4, as generally designated 40, is the removable end plate of that structure. Its inner bore 41 is sized about the same as, or only slightly greater in diameter than, the bore of the plate 36 to have a reasonably close tolerance axial fit on the shaft 23, i.e., not such as to bind or interfere materially with the dismantling of plate 39 using a tool 32. In this instance, the plate 39 is provided with a series of through-holes 42 of the same number and axially aligned respectively with the pin-mounting holes of plate 36; and holes 42 also receive reduced diameter end portions 43 of the pivot pins 37. However, this is with a slip fit permitting the contemplated ready removal and replacement of the plate 39 of hub structure 40 on the driving shaft. The bodies of the pins 37, as end-abutted between plates 36 and 39, serve as the sole means for holding the latter in proper axial spacing relative to the other plate.

FIGS. 5 and 6 illustrate a further alternative type of hub structure, here generally designated by the reference numeral 44, in which the left-hand end plate unit (FIG. 5) is composite in nature. It includes a plain outer flat and radially disposed disc 45 having a central bore sized to fit with reasonably close tolerance on a reduced diameter portion 46 of a drive shaft 47, which shaft thus presents an axially facing shoulder at 48 against which plate component 45 abuts. A second plain, disc-like end plate component 49 is of greater axial thickness than plate component 44 and has flat surface engagement against the latter, its axial bore equaling that of the plate element 45. The reference numeral 50 generally designates the composite lefthand plate unit of FIG. 5.

Plate 49 of that unit is formed on its inner axial side to provide an annular circular recess 51 co-axial with but a bit radially outwardly of reduced shaft portion 46, which recess fixedly receives the left-hand end (FIG. 5) of a cylindrical spacer sleeve 52, preferably with a force fit. Further, the inner plate part 49 is provided adjacent its outer periphery with a circumferential series of through-holes 53, in which ends of plain cylindrical, elongated pack pivoting pins 54 are force-fitted. The pins 54 outwardly abut the outer plate component 45 and again, in effect constitute unitary pivot parts of the composite plate unit 50. This is also true of the forcefitted spacer sleeve 50 as it axially abuts inner plate 49.

The other, right-hand pack confining plate unit, as viewed in FIG. 5, is the removable one and is generally designated 56. It is identical to the left-hand plate member, although oppositely oriented axially, of course, except as to the size of the pin-receiving holes 53' in its inner plate part 49 and its spacer sleevereceiving recess 51'. In this case, slightly larger diameters are provided for a slip fit of the pins 54 and sleeve 52 into the holes and recess. The respective outer and inner plate components 45', 49' of unit 56 have bore sizes also permitting a relatively easy removal and replacement of that unit for the intended purpose.

A holding collar 58 surrounds the reduced shaft portion 46 outwardly of end plate unit, being secured to the shaft by a set screw 59, and thus releasably maintaining the desired axial spacing of plate components relative to one another. If desired, knock-out holes similar to the holes 30 of the earlier embodiments may also be provided in the plate unit 50.

What is claimed is:

1. A hub structure for a finishing wheel rotatable by a wheel driver, comprising a pair of axially spaced, radially outwardly extending plate-like members adapted to axially confine therebetween finishing means arranged circumferentially about the rotative axis of said structure and driver, one of said members being adapted to be relatively permanently associated with said driver and the other member having means for a fixed but removable and replaceable mounting thereof in relation to said one member and wheel driver to so confine said finishing means, and a circumferential series of mounting pins fixed on said one member radially outwardly of said driver and axially spanning the space between said members, said pins having axial abutting engagement adjacent an end thereof with a portion of the removable member to space the latter from said one member, said means mounting the removable member including recesses therein in which said abutting pin ends are axially received with a readily removable radial fit, said one member having a radial plate part and an axially extending sleeve part in fixed relation to the plate part, said sleeve part axially engaging said removable member to assist said pins in axially spacing said members, said sleeve part being received at its opposite axial ends in annular recesses of said confining plates, said plate members each including an axially inner plate part receiving the pin ends and an axially outer plate part radially outwardly overlapping said ends.

2. A hub structure for a finishing wheel rotatable by a wheel driver, comprising a pair of axially spaced, radially outwardly extending plate-like members adapted to axially confine therebetween finishing means arranged circumferentially about the rotative axis of said structure and driver, one of said members being adapted to be relatively permanently associated with said driver and the other member having means for a fixed but removable and replaceable mounting thereof in relation to said one member and wheel driver to so confine said finishing means, and a circumferential series of mounting pins fixed on said one member radially outwardly of said driver and axially spanning the space between said members, said pins having axial abutting engagement adjacent an end thereof with a portion of the removable member to space the latter from said one member, said means mounting the removable member including recesses therein in which said abutting pin ends are axially received with a readily removable radial fit, said recesses receiving said abutting pin ends extending wholly through said removable platelike member, said one member having a radial plate part and an axially extending sleeve part in fixed relation to the plate part, said sleeve part axially engaging said removable member to assist said pins in axially spacing said members, said sleeve part being received at its opposite axial ends in annular recesses of said confining plates, said plate members each including an axially inner plate part receiving the pin ends and an axially outer plate part radially outwardly overlapping said ends.

3. A hub structure for a finishing wheel rotatable by a wheel driver, comprising axially spaced pairs of axially inner and outer, radially outwardly extending plate-like members, the inner and outer members of the respective pairs being adjacent one another and adapted to axially confine between said pairs finishing means arranged circumferentially about the rotative axis of said structure, the inner member of one of said pairs being adapted to be relatively permanently associated with said driver and at least the outer member of the other pair having means for a fixed but removable and replaceable mounting thereof in relation to the inner member of the said other pair to so confine said finishing means, a circumferential series of mounting pins fixed on said one member radially outwardly of said driver and axially spanning the space between said pairs of members, said pins having axial abutting engagement adjacent an end thereof with a portion of the removable outer member, the inner member adjacent said removable member having recesses therein in which said abutting pin ends are axially received with a readily removable fit, and an axially extending sleeve in fixed relation to and between said pairs, said sleeve having ends axially engaging between the inner members of the respective pairs in the axially spacing of the latter.

4. The hub structure of claim 3, in which the engagement of one of said inner members with a sleeve end is a releasable end-abutting engagement. 

1. A hub structure for a finishing wheel rotatable by a wheel driver, comprising a pair of axially spaced, radially outwardly extending plate-like members adapted to axially confine therebetween finishing means arranged circumferentially about the rotative axis of said structure and driver, one of said members being adapted to be relatively permanently associated with said driver and the other member having means for a fixed but removable and replaceable mounting thereof in relation to said one member and wheel driver to so confine said finishing means, and a circumferential series of mounting pins fixed on said one member radially outwardly of said driver and axially spanning the space between said members, said pins having axial abutting engagement adjacent an end thereof with a portion of the removable member to space the latter from said one member, Said means mounting the removable member including recesses therein in which said abutting pin ends are axially received with a readily removable radial fit, said one member having a radial plate part and an axially extending sleeve part in fixed relation to the plate part, said sleeve part axially engaging said removable member to assist said pins in axially spacing said members, said sleeve part being received at its opposite axial ends in annular recesses of said confining plates, said plate members each including an axially inner plate part receiving the pin ends and an axially outer plate part radially outwardly overlapping said ends.
 2. A hub structure for a finishing wheel rotatable by a wheel driver, comprising a pair of axially spaced, radially outwardly extending plate-like members adapted to axially confine therebetween finishing means arranged circumferentially about the rotative axis of said structure and driver, one of said members being adapted to be relatively permanently associated with said driver and the other member having means for a fixed but removable and replaceable mounting thereof in relation to said one member and wheel driver to so confine said finishing means, and a circumferential series of mounting pins fixed on said one member radially outwardly of said driver and axially spanning the space between said members, said pins having axial abutting engagement adjacent an end thereof with a portion of the removable member to space the latter from said one member, said means mounting the removable member including recesses therein in which said abutting pin ends are axially received with a readily removable radial fit, said recesses receiving said abutting pin ends extending wholly through said removable plate-like member, said one member having a radial plate part and an axially extending sleeve part in fixed relation to the plate part, said sleeve part axially engaging said removable member to assist said pins in axially spacing said members, said sleeve part being received at its opposite axial ends in annular recesses of said confining plates, said plate members each including an axially inner plate part receiving the pin ends and an axially outer plate part radially outwardly overlapping said ends.
 3. A hub structure for a finishing wheel rotatable by a wheel driver, comprising axially spaced pairs of axially inner and outer, radially outwardly extending plate-like members, the inner and outer members of the respective pairs being adjacent one another and adapted to axially confine between said pairs finishing means arranged circumferentially about the rotative axis of said structure, the inner member of one of said pairs being adapted to be relatively permanently associated with said driver and at least the outer member of the other pair having means for a fixed but removable and replaceable mounting thereof in relation to the inner member of the said other pair to so confine said finishing means, a circumferential series of mounting pins fixed on said one member radially outwardly of said driver and axially spanning the space between said pairs of members, said pins having axial abutting engagement adjacent an end thereof with a portion of the removable outer member, the inner member adjacent said removable member having recesses therein in which said abutting pin ends are axially received with a readily removable fit, and an axially extending sleeve in fixed relation to and between said pairs, said sleeve having ends axially engaging between the inner members of the respective pairs in the axially spacing of the latter.
 4. The hub structure of claim 3, in which the engagement of one of said inner members with a sleeve end is a releasable end-abutting engagement. 